Impact-cushioning particles, artificial turf structure, and paved structure

Abstract

Impact-cushioning particles contain a poly(3-hydroxybutyrate) resin component. The poly(3-hydroxybutyrate) resin component contains a copolymer component (A), and the copolymer component (A) includes a copolymer (A-1) and/or a copolymer (A-2). The impact-cushioning particles are suitable for use in artificial turf or a paved structure. Copolymer (A-1) is a copolymer of 3-hydroxybutyrate units and other hydroxyalkanoate units, in which the content of the other hydroxyalkanoate units is from 1 to less than 10 mol %. Copolymer (A-2) is a copolymer of 3-hydroxybutyrate units and other hydroxyalkanoate units, in which the content of the other hydroxyalkanoate units is 24 mol % or more.

1 - 10 . (canceled) 
     
     
         11 : An artificial turf structure, comprising artificial turf and the impact-cushioning particles comprising a poly(3-hydroxybutyrate) resin component, wherein
 gaps between piles of the artificial turf are filled with the impact-cushioning particles,   the poly(3-hydroxybutyrate) resin component comprises a copolymer component (A),   the copolymer component (A) comprises a copolymer (A-1) and/or a copolymer (A-2),   an average content of hydroxyalkanoate units other than 3-hydroxybutyrate units in the poly(3-hydroxybutyrate) resin component is from 10 to 25 mol %,   the copolymer (A-1) is a copolymer of 3-hydroxybutyrate units and other hydroxyalkanoate units, wherein a content of the other hydroxyalkanoate units is from 1 to less than 10 mol %, and   the copolymer (A-2) is a copolymer of 3-hydroxybutyrate units and other hydroxyalkanoate units, wherein a content of the other hydroxyalkanoate units is 24 mol % or more.   
     
     
         12 . (canceled) 
     
     
         13 : The artificial turf structure according to  claim 11 , wherein a content of the copolymer (A-1) and/or the copolymer (A-2) is at least 50 wt % based on a total weight of the poly(3-hydroxybutyrate) resin component. 
     
     
         14 : The artificial turf structure according to  claim 11 , wherein the poly(3-hydroxybutyrate) resin component has a melting point of from 120° C. to 170° C. 
     
     
         15 : The artificial turf structure according to  claim 11 , wherein the other hydroxyalkanoate units are 3-hydroxyhexanoate units. 
     
     
         16 : The artificial turf structure according to  claim 11 , comprising from 10 to 70 parts by weight of a plasticizer per 100 parts by weight of the total poly(3-hydroxybutyrate) resin component. 
     
     
         17 : The artificial turf structure according to  claim 16 , wherein the plasticizer is a modified glycerin ester compound. 
     
     
         18 : The artificial turf structure according to  claim 17 , wherein the modified glycerin ester compound comprises at least one compound selected from the group consisting of glycerin diacetomonolaurate, glycerin diacetomonooleate, glycerin monoacetomonostearate, glycerin diacetomonocaprylate, and glycerin diacetomonodecanoate. 
     
     
         19 : The artificial turf structure according to  claim 18 , wherein the modified glycerin ester compound comprises glycerin diacetomonolaurate.